#ifndef NETWORK_SET_H_3036B8E3
#define NETWORK_SET_H_3036B8E3

#include <map>
#include <optional>
#include <set>
#include <utility>
#include <vector>

class NetworkSet {
 public:
  void Clear();

  void AddLink(int id1, int id2);

  void AddLinkToNetwork(int network_id, int id1, int id2);

  bool IsItemInNetwork(int id) const;

  const std::set<std::pair<int, int>>& GetNetworkGraph(int id) const;

 private:

  std::map<int, std::set<std::pair<int, int>>> network_by_item_;
};

#endif /* end of include guard: NETWORK_SET_H_3036B8E3 */